Headphone



FIG. 1 is a perspective view of a headphone showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof.

Portions in broken lines are for illustrative purposes only and form nopart of claimed design.

CLAIM The ornamental design for a headphone, as shown and described.